Natural selection only acts directly on phenotype, not genotype. It acts directly on an organisms characteristics, not its alleles. Natural selection never acts directly on genes.
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Cellular respiration converts oxygen and glucose into water and carbon dioxide.
Explanation:
Answer:
a pure substance
Explanation:
A pure substance is made up of only one kind of matter and has definite properties. A pure substance has matter having an invariant chemical composition and distinct properties. A pure substance can be an element or a compound.
An element is a fundamental substance that cannot be separated into smaller substances by chemical method. A compound is a substance composed of two or more elements in fixed proportions and can be separated into smaller substances or elements by chemical methods only.
Answer:
Bacteria helps digest food, make vitamins, and play other important roles